শ্বাসতন্ত্রের অনুশীলনকারী/ফুসফুসের অনুশীলনকারী

UNIQUE FEATURE: Device is composed of a base & central part divided into three chambers containing three small spheres differently in colour & size (each chamber expresses the inhalation value per second: 600, 900, 1200cc)
BENEFITS : Sustained deep breath